7 Addresses scanned: from Super I/O config space (8 I/O ports)
8 Datasheet: Not publicly available
11 Addresses scanned: from Super I/O config space (8 I/O ports)
12 Datasheet: Not publicly available
15 Addresses scanned: from Super I/O config space (8 I/O ports)
18 Addresses scanned: from Super I/O config space (8 I/O ports)
19 Datasheet: Not publicly available
22 Addresses scanned: from Super I/O config space (8 I/O ports)
23 Datasheet: Not publicly available
26 Addresses scanned: from Super I/O config space (8 I/O ports)
27 Datasheet: Not publicly available
30 Addresses scanned: from Super I/O config space (8 I/O ports)
31 Datasheet: Once publicly available at the ITE website, but no longer
34 Addresses scanned: from Super I/O config space (8 I/O ports)
35 Datasheet: Once publicly available at the ITE website, but no longer
38 Addresses scanned: from Super I/O config space (8 I/O ports)
39 Datasheet: Once publicly available at the ITE website, but no longer
42 Addresses scanned: from Super I/O config space (8 I/O ports)
43 Datasheet: Once publicly available at the ITE website, but no longer
46 Addresses scanned: from Super I/O config space (8 I/O ports)
47 Datasheet: Not publicly available
50 Addresses scanned: from Super I/O config space (8 I/O ports)
51 Datasheet: Not publicly available
54 Addresses scanned: from Super I/O config space (8 I/O ports)
55 Datasheet: Not publicly available
58 Addresses scanned: from Super I/O config space (8 I/O ports)
59 Datasheet: Not publicly available
62 Addresses scanned: from Super I/O config space (8 I/O ports)
63 Datasheet: Not publicly available
66 Addresses scanned: from Super I/O config space (8 I/O ports)
67 Datasheet: Not publicly available
70 Addresses scanned: from Super I/O config space (8 I/O ports)
71 Datasheet: Not publicly available
74 Addresses scanned: from Super I/O config space (8 I/O ports)
75 Datasheet: Not publicly available
78 Addresses scanned: from Super I/O config space (8 I/O ports)
79 Datasheet: Not publicly available
82 Addresses scanned: from Super I/O config space (8 I/O ports)
83 Datasheet: Not publicly available
86 Addresses scanned: from Super I/O config space (8 I/O ports)
87 Datasheet: Not publicly available
88 * SiS950 [clone of IT8705F]
90 Addresses scanned: from Super I/O config space (8 I/O ports)
91 Datasheet: No longer be available
95 Jean Delvare <jdelvare@suse.de>
103 0 if vbat should report power on value, 1 if vbat should be updated after
104 each read. Default is 0. On some boards the battery voltage is provided
105 by either the battery or the onboard power supply. Only the first reading
106 at power on will be the actual battery voltage (which the chip does
107 automatically). On other boards the battery voltage is always fed to
108 the chip so can be read at any time. Excessive reading may decrease
109 battery life but no information is given in the datasheet.
111 * fix_pwm_polarity int
113 Force PWM polarity to active high (DANGEROUS). Some chips are
114 misconfigured by BIOS - PWM values would be inverted. This option tries
115 to fix this. Please contact your BIOS manufacturer and ask him for fix.
121 All the chips supported by this driver are LPC Super-I/O chips, accessed
122 through the LPC bus (ISA-like I/O ports). The IT8712F additionally has an
123 SMBus interface to the hardware monitoring functions. This driver no
124 longer supports this interface though, as it is slower and less reliable
125 than the ISA access, and was only available on a small number of
132 This driver implements support for the IT8603E, IT8620E, IT8622E, IT8623E,
133 IT8628E, IT8705F, IT8712F, IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F,
134 IT8732F, IT8758E, IT8771E, IT8772E, IT8781F, IT8782F, IT8783E/F, IT8786E,
135 IT8790E, and SiS950 chips.
137 These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
138 joysticks and other miscellaneous stuff. For hardware monitoring, they
139 include an 'environment controller' with 3 temperature sensors, 3 fan
140 rotation speed sensors, 8 voltage sensors, associated alarms, and chassis
143 The IT8712F and IT8716F additionally feature VID inputs, used to report
144 the Vcore voltage of the processor. The early IT8712F have 5 VID pins,
145 the IT8716F and late IT8712F have 6. They are shared with other functions
146 though, so the functionality may not be available on a given system.
148 The IT8718F and IT8720F also features VID inputs (up to 8 pins) but the value
149 is stored in the Super-I/O configuration space. Due to technical limitations,
150 this value can currently only be read once at initialization time, so
151 the driver won't notice and report changes in the VID value. The two
152 upper VID bits share their pins with voltage inputs (in5 and in6) so you
153 can't have both on a given board.
155 The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E and later IT8712F revisions
156 have support for 2 additional fans. The additional fans are supported by the
159 The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E, IT8732F, IT8781F, IT8782F,
160 IT8783E/F, and late IT8712F and IT8705F also have optional 16-bit tachometer
161 counters for fans 1 to 3. This is better (no more fan clock divider mess) but
162 not compatible with the older chips and revisions. The 16-bit tachometer mode
163 is enabled by the driver when one of the above chips is detected.
165 The IT8726F is just bit enhanced IT8716F with additional hardware
166 for AMD power sequencing. Therefore the chip will appear as IT8716F
167 to userspace applications.
169 The IT8728F, IT8771E, and IT8772E are considered compatible with the IT8721F,
170 until a datasheet becomes available (hopefully.)
172 The IT8603E/IT8623E is a custom design, hardware monitoring part is similar to
173 IT8728F. It only supports 3 fans, 16-bit fan mode, and the full speed mode
174 of the fan is not supported (value 0 of pwmX_enable).
176 The IT8620E and IT8628E are custom designs, hardware monitoring part is similar
177 to IT8728F. It only supports 16-bit fan mode. Both chips support up to 6 fans.
179 The IT8790E supports up to 3 fans. 16-bit fan mode is always enabled.
181 The IT8732F supports a closed-loop mode for fan control, but this is not
182 currently implemented by the driver.
184 Temperatures are measured in degrees Celsius. An alarm is triggered once
185 when the Overtemperature Shutdown limit is crossed.
187 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
188 triggered if the rotation speed has dropped below a programmable limit. When
189 16-bit tachometer counters aren't used, fan readings can be divided by
190 a programmable divider (1, 2, 4 or 8) to give the readings more range or
191 accuracy. With a divider of 2, the lowest representable value is around
192 2600 RPM. Not all RPM values can accurately be represented, so some rounding
195 Voltage sensors (also known as IN sensors) report their values in volts. An
196 alarm is triggered if the voltage has crossed a programmable minimum or
197 maximum limit. Note that minimum in this case always means 'closest to
198 zero'; this is important for negative voltage measurements. On most chips, all
199 voltage inputs can measure voltages between 0 and 4.08 volts, with a resolution
200 of 0.016 volt. IT8603E, IT8721F/IT8758E and IT8728F can measure between 0 and
201 3.06 volts, with a resolution of 0.012 volt. IT8732F can measure between 0 and
202 2.8 volts with a resolution of 0.0109 volt. The battery voltage in8 does not
203 have limit registers.
205 On the IT8603E, IT8620E, IT8628E, IT8721F/IT8758E, IT8732F, IT8781F, IT8782F,
206 and IT8783E/F, some voltage inputs are internal and scaled inside the chip:
208 * in7 (optional for IT8781F, IT8782F, and IT8783E/F)
210 * in9 (relevant for IT8603E only)
211 The driver handles this transparently so user-space doesn't have to care.
213 The VID lines (IT8712F/IT8716F/IT8718F/IT8720F) encode the core voltage value:
214 the voltage level your processor should work with. This is hardcoded by
215 the mainboard and/or processor itself. It is a value in volts.
217 If an alarm triggers, it will remain triggered until the hardware register
218 is read at least once. This means that the cause for the alarm may already
219 have disappeared! Note that in the current implementation, all hardware
220 registers are read whenever any data is read (unless it is less than 1.5
221 seconds since the last update). This means that you can easily miss
224 Out-of-limit readings can also result in beeping, if the chip is properly
225 wired and configured. Beeping can be enabled or disabled per sensor type
226 (temperatures, voltages and fans.)
228 The IT87xx only updates its values each 1.5 seconds; reading it more often
229 will do no harm, but will return 'old' values.
231 To change sensor N to a thermistor, 'echo 4 > tempN_type' where N is 1, 2,
232 or 3. To change sensor N to a thermal diode, 'echo 3 > tempN_type'.
233 Give 0 for unused sensor. Any other value is invalid. To configure this at
234 startup, consult lm_sensors's /etc/sensors.conf. (4 = thermistor;
241 The fan speed control features are limited to manual PWM mode. Automatic
242 "Smart Guardian" mode control handling is only implemented for older chips
243 (see below.) However if you want to go for "manual mode" just write 1 to
246 If you are only able to control the fan speed with very small PWM values,
247 try lowering the PWM base frequency (pwm1_freq). Depending on the fan,
248 it may give you a somewhat greater control range. The same frequency is
249 used to drive all fan outputs, which is why pwm2_freq and pwm3_freq are
253 Automatic fan speed control (old interface)
254 -------------------------------------------
256 The driver supports the old interface to automatic fan speed control
257 which is implemented by IT8705F chips up to revision F and IT8712F
258 chips up to revision G.
260 This interface implements 4 temperature vs. PWM output trip points.
261 The PWM output of trip point 4 is always the maximum value (fan running
262 at full speed) while the PWM output of the other 3 trip points can be
263 freely chosen. The temperature of all 4 trip points can be freely chosen.
264 Additionally, trip point 1 has an hysteresis temperature attached, to
265 prevent fast switching between fan on and off.
267 The chip automatically computes the PWM output value based on the input
268 temperature, based on this simple rule: if the temperature value is
269 between trip point N and trip point N+1 then the PWM output value is
270 the one of trip point N. The automatic control mode is less flexible
271 than the manual control mode, but it reacts faster, is more robust and
272 doesn't use CPU cycles.
274 Trip points must be set properly before switching to automatic fan speed
275 control mode. The driver will perform basic integrity checks before
276 actually switching to automatic control mode.
279 Temperature offset attributes
280 -----------------------------
282 The driver supports temp[1-3]_offset sysfs attributes to adjust the reported
283 temperature for thermal diodes or diode-connected thermal transistors.
284 If a temperature sensor is configured for thermistors, the attribute values
285 are ignored. If the thermal sensor type is Intel PECI, the temperature offset
286 must be programmed to the critical CPU temperature.
291 Support for IT8607E, IT8665E, and IT8686E is preliminary. Voltage readings,
292 temperature readings, fan control, and fan speed measurements may be wrong
293 and/or missing. Fan control and fan speed may be enabled and reported for
294 non-existing fans. Please report any problems and inconsistencies.
296 Reporting information for unsupported chips
297 -------------------------------------------
299 If the chip in your system is not yet supported by the driver, please provide
300 the following information.
302 First, run sensors-detect. It will tell you something like
304 Probing for Super-I/O at 0x2e/0x2f
306 Trying family `ITE'... Yes
307 Found unknown chip with ID 0x8665
308 (logical device 4 has address 0x290, could be sensors)
310 With this information, run the following commands.
312 sudo isadump -k 0x87,0x01,0x55,0x55 0x2e 0x2f 7
313 sudo isadump 0x295 0x296
315 and report the results.
317 The addresses in the first command are from "Probing for Super-I/O at
318 0x2e/0x2f". Use those addresses in the first command.
319 sudo isadump -k 0x87,0x01,0x55,0x55 0x2e 0x2f 7
321 The addresses in the second command are from "has address 0x290".
322 Add 5 and 6 to this address for the next command.
323 sudo isadump 0x295 0x296
325 Next, force-install the driver by providing one of the already supported chips
326 as forced ID. Useful IDs to test are 0x8622, 0x8628, 0x8728, and 0x8732, though
327 feel free to test more IDs. For each ID, instantiate the driver as follows
328 (this example is instantiating driver with ID 0x8622).
329 sudo modprobe it87 force_id=0x8622
330 After entering this command, run the "sensors" command and provide the output.
331 Then unload the driver with
332 sudo modprobe -r it87
333 Repeat with different chip IDs, and report each result.
335 Please also report your board type as well as voltages and fan settings from
336 the BIOS. If possible, connect fans to different fan headers and let us know
337 if all fans are detected and reported.
339 This information _might_ give us enough information to add experimental support
340 for the chip in question. No guarantees, though - unless a datasheet is
341 available, something is likely to be wrong.